netdev - Re: [PATCH net-next] rds: rds_msg_zcopy should return error of null rm->data.op_mmp

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Date:   Thu, 22 Feb 2018 16:01:48 -0800
From:   Santosh Shilimkar <santosh.shilimkar@...cle.com>
To:     Sowmini Varadhan <sowmini.varadhan@...cle.com>,
        netdev@...r.kernel.org
Cc:     davem@...emloft.net
Subject: Re: [PATCH net-next] rds: rds_msg_zcopy should return error of null
 rm->data.op_mmp_znotifier

On 2/22/2018 1:40 PM, Sowmini Varadhan wrote:
> if either or both of MSG_ZEROCOPY and SOCK_ZEROCOPY have not been
> specified, the rm->data.op_mmp_znotifier allocation will be skipped.
> In this case, it is invalid ot pass down a cmsghdr with
> RDS_CMSG_ZCOPY_COOKIE, so return EINVAL from rds_msg_zcopy for this
> case.
> 
> Reported-by: syzbot+f893ae7bb2f6456dfbc3@...kaller.appspotmail.com
> Fixes: 0cebaccef3ac ("rds: zerocopy Tx support.")
> Signed-off-by: Sowmini Varadhan <sowmini.varadhan@...cle.com>
> ---

Acked-by: Santosh Shilimkar <santosh.shilimkar@...cle.com>